How do I add a new empty line to the beginning of a file under MacOS and Linux?
I have tried the below command and it produces a new line character under MacOS
sed -i.bak '1s/^/TESTe\n/' test.py
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Zumo de Vidrio
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can you show what output you got? and what is expected output? – user13107 Jan 25 '17 at 04:20
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2I'm not familiar with osx, but I'd suggest you use the `i` (insert) command rather than the `s` (substitute) command - that way, you should be able to avoid the need to specify an explicit line termination – steeldriver Jan 25 '17 at 04:27
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`cp test.py test.py.bak && (echo TESTe; cat test.py.bak) >test.py` – Satō Katsura Jan 25 '17 at 07:15
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A Linux solution is `sed -e '1s/^/\n/' filename` – Zumo de Vidrio Jan 25 '17 at 07:55